Tritium, a radioactive isotope of hydrogen, emits which of the following particles?

1. Gamma (γ)

2. Neutron (n)

3. Beta β-

4. Alpha (α)

Subtopic:  Hydrogen- Types & Isotopes |
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Match the following and identify the correct option

(a) CO(g)+H2(g) (i) Mg(HCO3)2+Ca(HCO3)2
(b) Temporary hardness of water (ii) An electron deficient hydride
(c) B2H6 (iii) Synthesis gas
(d) H2O2 (iv) Non-planar structure
 
(a) (b) (c) (d)
1. (iii) (ii) (i) (iv)
2. (iii) (iv) (ii) (i)
3. (i) (iii) (ii) (iv)
4. (iii) (i) (ii) (iv)
Subtopic:  Hard & Soft Water | H2O2 (Hydrogen Peroxide) |
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The method used to remove the temporary hardness of water is-

1. Synthetic resins method

2. Calgon's method

3. Clark's method

4. Ion-exchange method

Subtopic:  Hard & Soft Water |
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Match List - I with List - II.

List-I
(Hydrides)
List - II
(Nature)
(a) MgH2 (i) Electron precise
(b) GeH4 (ii) Electron deficient
(c) B2H6 (iii) Electron rich
(d) HF (iv) Ionic
Choose the correct answer from the options given below:
(a) (b) (c) (d)
1. (ii) (iii) (iv) (i)
2. (iv) (i) (ii) (iii)
3. (iii) (i) (ii) (iv)
4. (i) (ii) (iv) (iii)
Subtopic:  Type of Hydride |
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Match list-I with list-II:

List-I
(Commercial name)
List-II
(Chemical name)
(a) Calgon (i) Sodium aluminium silicate (hydrated)
(b) Permutit (ii) Sodium carbonate
(c) Soap (iii) Sodium hexameta-phosphate
(d) Washing soda (iv) Sodium stearate

Choose the correct answer from the options given below:

(a) (b) (c) (d)
1. (i) (iv) (ii) (iii)
2. (iii) (i) (iv) (ii)
3. (ii) (iii) (iv) (i)
4. (iv) (iii) (i) (ii)
Subtopic:  Hard & Soft Water |
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The element used for welding metals with high melting points is:
1.  Cl2
2.  H2
3.  Ne
4.  He
Subtopic:  Preparation & Properties |
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